Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54be67961fc0289…

MALICIOUS

PDF

50.1 KB Created: 2020-04-08 00:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 54a51097ff2756dc1bd698812ec38d8d SHA-1: d63b4c4f1fc971f55fad1e3a9e8c0ad68b1af4f1 SHA-256: a54be67961fc0289ff2205e26bebced25721bebf1463d264c9ae85a025b1948f
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body also contains a specific URL pointing to 'blackmart+alpha+apk', suggesting a lure for downloading potentially malicious applications. The presence of numerous similar URLs across different domains reinforces the attack pattern of distributing malicious content via a link farm.

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://wccscience.com/uploads/1/3/1/0/131070481/131070481.html#blackmart+alpha+apk
    • http://sbkbullies.com/uploads/1/3/0/4/130477126/a8f448e358779e1.pdf
    • http://sarahloepp.com/uploads/1/3/0/5/130539913/7b4a9b24abee.pdf
    • http://wisewomanspiral.com/uploads/1/3/0/7/130738845/jefufebip.pdf
    • http://shopdubiasrus.com/uploads/1/3/0/6/130604032/ca992.pdf
    • http://tdlaero.com/uploads/1/3/0/6/130639764/f6d6c992eddff6c.pdf
    • http://fitmax.org/uploads/1/3/0/3/130312913/1079474.pdf
    • http://amesburychildrenstheatre.org/uploads/1/3/1/3/131380404/6077537.pdf
    • http://apralegoversalves.com/uploads/1/3/0/6/130639038/welusiwuf.pdf
    • http://crazyfunart.com/uploads/1/3/0/6/130605498/gojabusuditi-netem.pdf
    • http://ascoconstruction.net/uploads/1/3/0/2/130288986/4b6ccfa1e3.pdf
    • http://phillipsquarterhorses.com/uploads/1/3/1/3/131380456/wetinisawelarofijeda.pdf
    • http://cconsultingsa.com/uploads/1/3/0/2/130289271/nafep.pdf
    • http://shadykissnyc.com/uploads/1/3/0/5/130590700/kodekuxebalajewim.pdf
    • http://pypexhibition.com/uploads/1/3/0/9/130969209/legik.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000084eb.bin
4843a56fe111b4274118463d5f3f9e75a0afe9f061149e8ffab5d3a57a59088a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EB 8440 bytes
font_01_sfnt_off0000a523.bin
b63ec7160036b1a427c70edb4e2dae4fecc64afc162aee8575e71397b91733d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA523 16368 bytes

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